Changes

<math>d_{s}=\frac{f'\times 96}{0.4}</math>

<math>d_{s}=\frac{f'\times 96}{0.4}</math>

{{Plainlist|1=Where:

{{Plainlist|1=Where:

*''f''' = Design infiltration rate in mm/hr, and

*''f''' = Design infiltration rate (mm/hr), and

*96 is the desired drainage time in hours

*96 is the desired drainage time (hrs)

*0.4 is the void ratio of [[reservoir gravel|clear stone]]}}

*0.4 is the Void ratio of [[reservoir gravel|clear stone]]}}

===Additional step for system without underdrain===

===Additional step for system without underdrain===

<math>d_{p}=\frac{f'\times48}{0.4}</math>

<math>d_{p}=\frac{f'\times48}{0.4}</math>

{{Plainlist|1=Where:

{{Plainlist|1=Where:

*''f''' = Design infiltration rate in mm/hr, and

*''f''' = Design infiltration rate (mm/hr), and

*48 is the desired drainage time of the ponding in hours

*48 is the desired drainage time of the ponding (hrs)

*0.4 is the void ratio of [[reservoir gravel|clear stone]] *Note that conceptually the drainage of the ponded area is limited by ex-filtration at the base of the practice.}}

*0.4 is the void ratio of [[reservoir gravel|clear stone]] *Note that conceptually the drainage of the ponded area is limited by ex-filtration at the base of the practice.}}

* Step 5: Sum total depth of bioretention, and compare to available space above water table and bedrock. Adjust if necessary.

* Step 5: Sum total depth of bioretention, and compare to available space above water table and bedrock. Adjust if necessary.